<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @subpackage Object
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Code25.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Barcode_Object_ObjectAbstract
 */
require_once 'Zend/Barcode/Object/ObjectAbstract.php';

/**
 * @see Zend_Validate_Barcode
 */
require_once 'Zend/Validate/Barcode.php';

/**
 * Class for generate Interleaved 2 of 5 barcode
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Barcode_Object_Code25 extends Zend_Barcode_Object_ObjectAbstract {
	/**
	 * Coding map
	 * - 0 = narrow bar
	 * - 1 = wide bar
	 * @var array
	 */
	protected $_codingMap = array ('0' => '00110', '1' => '10001', '2' => '01001', '3' => '11000', '4' => '00101', '5' => '10100', '6' => '01100', '7' => '00011', '8' => '10010', '9' => '01010' );
	
	/**
	 * Width of the barcode (in pixels)
	 * @return integer
	 */
	protected function _calculateBarcodeWidth() {
		$quietZone = $this->getQuietZone ();
		$startCharacter = (2 * $this->_barThickWidth + 4 * $this->_barThinWidth) * $this->_factor;
		$characterLength = (3 * $this->_barThinWidth + 2 * $this->_barThickWidth + 5 * $this->_barThinWidth) * $this->_factor;
		$encodedData = strlen ( $this->getText () ) * $characterLength;
		$stopCharacter = (2 * $this->_barThickWidth + 4 * $this->_barThinWidth) * $this->_factor;
		return $quietZone + $startCharacter + $encodedData + $stopCharacter + $quietZone;
	}
	
	/**
	 * Partial check of interleaved 2 of 5 barcode
	 * @return void
	 */
	protected function _checkParams() {
		$this->_checkRatio ();
	}
	
	/**
	 * Prepare array to draw barcode
	 * @return array
	 */
	protected function _prepareBarcode() {
		$barcodeTable = array ();
		
		// Start character (30301)
		$barcodeTable [] = array (1, $this->_barThickWidth, 0, 1 );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (1, $this->_barThickWidth, 0, 1 );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (0, $this->_barThinWidth );
		
		$text = str_split ( $this->getText () );
		foreach ( $text as $char ) {
			$barcodeChar = str_split ( $this->_codingMap [$char] );
			foreach ( $barcodeChar as $c ) {
				/* visible, width, top, length */
				$width = $c ? $this->_barThickWidth : $this->_barThinWidth;
				$barcodeTable [] = array (1, $width, 0, 1 );
				$barcodeTable [] = array (0, $this->_barThinWidth );
			}
		}
		
		// Stop character (30103)
		$barcodeTable [] = array (1, $this->_barThickWidth, 0, 1 );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (1, $this->_barThickWidth, 0, 1 );
		return $barcodeTable;
	}
	
	/**
	 * Get barcode checksum
	 *
	 * @param  string $text
	 * @return int
	 */
	public function getChecksum($text) {
		$this->_checkText ( $text );
		$factor = 3;
		$checksum = 0;
		
		for($i = strlen ( $text ); $i > 0; $i --) {
			$checksum += intval ( $text {$i - 1} ) * $factor;
			$factor = 4 - $factor;
		}
		
		$checksum = (10 - ($checksum % 10)) % 10;
		
		return $checksum;
	}
}
